Update

vendor/tailscale.com/feature/buildfeatures/buildfeatures.go

@@ -0,0 +1,10 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+//go:generate go run gen.go
+
+// The buildfeatures package contains boolean constants indicating which
+// features were included in the binary (via build tags), for use in dead code
+// elimination when using separate build tag protected files is impractical
+// or undesirable.
+package buildfeatures